I just got my first F2B pre amp. I am currently scoutin for a QSC PLX amp. Anyway, plugged the F2B into an old Peavey CS-400 laying around , plugged everything up and....nothing! Frustration.....Opps....bad instrument cord (Brand New) I was amazed at the first few notes I played and it only took a few seconds to dail in a tone. I continued to have a very enjoyable night as did my band mates! This pre amp is..well..simply amazing..amazing...amazing! I now wonder if I'd done this 30 years ago if today I may be playing beside Stan, Jocko & Mark! Did I mention the amazement! Steve

Plug your bass into channel A input 1 then take the output from the back of the preamp and plug it into channel B input 1 thake the output from channel 2 into your power amp. You get a warm rocky distorted sound. Do not worry you cannot damage the F-2B by doing this.